Crossing-gate.



UNITED STATES PATENT OFFICE.

JOHN J. GARD, OF HARVEY ILLINOIS, ASSIGNOR TO BUDA FOUNDRY & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CROSSING-GATE.

Specification of Letters Patent.

Application filed January 25,1907. Serial No. 353,990.

To all whom it may concern:

Be it known that I JOHN J. GARD, a citiin the county of Cook and have invented certain new State of Illinois, and useful Imform of an open triangle and is each of its endswith a locking recess 1 1.

Patented Jan. 7', 1908.

provided at T he locking arm 9 is in the form of a bell crank lever and carries at one end to engage the sides of the sl provements in CrossingGatcs, of which the other end the locking rod 1 followin is a s iecilication.

My invention relates to crossing gates and particularly to the mechani and locking them in position.

for operating I he invention has for its objects: to provide a mechanism of this character of greater simplicity than has been sein use; to provide positiveness of operation cured in the devices now and a device in which the operating mechanism with the gate operating me other objects are attained by one embodiment of which the accompanying drawing ans. These and my invention, is illustrated in wherein,

Figure 1 is a longitudinal section through the operating mechanism, shown in lowered position,

the gate being Figure 2 is a section similar to that of Figure 1 but with the operating position assumed when the Figure 3 is a section thi on the line parts in the gate is raised,

'ough the casing IIIIII of Figure 1, looking to the right, the operating parts being in elevation, and

Figure 4 is a section thi on the 'ough the casing line IIIIII of Figure] looking to the left, the operating parts being in elevation.

Referring now to the dr ticularly to Figures 1 and '2, the device, 2- is the itse the shaft 3, and provided awings and par 1 is the casing of lf mounted upon with the usual counterweight 1, 5 is the operating cylinder, 6 is the piston of such operating cylinder,

7 is a connecting rod, 8 is tl which is secured rigidly to ie operating arm the shaft 3, S) is the locking arm for holding the gate in its two extreme positions and for giving the locking to locking position. The c has an enlargement provid 12 intermediate its ends, an

its lower end to the piston rod 6 while its upper the pivot S with a longitudinal slot 10 10 is the weight arm its final movement onnecting arm 1' ed. with the slot d is connected at by means of end, is provided for coi'i 'ierating with the pivot 11 carried by the operating arm 8. The operating arm 8 is made in the ating arm 8 thereby gage the locking recesses 1v the operating arm 8.

tutes the means for moving 9 to its extreme position with the a pin 13 adapted ot 12, and at the 6 adapted to en- 1 in the ends of The weight 10 constithe locking arm locking rod 16 in engagement with one of the recesses 14,

and is connected to the lo means of the chain 18. is pivotally cking rod 16 by The locking arm 9 supported by means ol the trunnion 1.7, which trunnion extends transversely across the casing and is provided with an off-set portion 19,

to receive the chain 18,

when the locking arm is moved to the position shown in Figure 2. the operating cylinder pipes 20 and 21.

Starting with shown in Figure Fluid being admitted to th Fluid is admitted to 5 by means of the the device in the position 1 the operation is as follows. c cylinder 5, the

piston rod 6 descends and as the pin 13 is in immediate contact with the upper side of the slot 12 the bell crank lover 9 will first be operated thereby releasing th 6 locking rod 16 from the locking recess 14 in the arm 8. This release occurs before any movement of the arm 8 because of the slot 10 which permits of a downward movement of the connecting rod 7 before the up slot engages the pivot 11. ment of the connecting rod arm of the bell crank lever 9 )01' side of such further moverotates the operraising the gate, which until the parts approach in Figure 2.

After the which carries the locking rod 16 has passcdits vertical position the weight 9 will carry the locking rod 16 to the position the cross rod crank lover to the bottom dicated in Figure 2.

engagement of the locking shown in Figure 2 and also bring 13 on the other arm of such bell of It will be seen that the the slot 1'2 as inrod 16 with the locking recess 14 prevents any rotary movement of the arm Sand secure in position.

ly locks such arm \Vhcn it is desired to lower the gate the operation. is reversed and air 18 admitted to the under side of the raising the connecting rod 7.

connecting rod oper for the reason that of this movement of the ates the locking member 9 the pin 1 8 is in engagement w piston thereby The first part ith the lower edge It will also be seen that member, and a locking member having a tion connections for operating the operating member, and a locking member having a lost motion connection with said operating meansand adapted to move the look engaging means partially to locking position, and independent means for giving the looking member its final movement to locking position.

4. In combination, a gate operating shaft, an operating arm secured thereto and provided with a pair of locking recesses, a looking arm adapted in one extreme position to engage one of said recesses and in the other extreme position to engage the other of said ment of the connecting rod, and as the pivot 1 1 engages the top of the slot 1 0 in the position of Figure 2, the locking device is completely free before the connecting rod commences to operate the arm 8. A still further movement of the connecting rod rotates the arm 8 and brings the parts finally to the position of Figure 1, the bell crank lever locking member moving to its final position with its locking rod 16 in engagement with the locking recess l of the slot 12 at the beginning of the movel 14 and with its pin 13 in engagement with the upper part of the slot 12 by virtue of the weight 9 which moves the bell crank lever independently of the connecting rod after the recesses and an operating means connected right hand end of such bell crank lever has to the operating arm and the locking arm passed its vertical center line. It will be I and adapted to cause the engagement of the seen from the foregoing that the operating locking arm with one of the said recesses mechanism involved is of a very simple nawhen the operating arm reaches one of its ture and that the gate is locked securely in extreme positions. its two extreme positions by a mechanism 5. In combination, a gate operating shaft, independent of the operating mechanism. an operating arm secured thereto and proby reason of the two vided with a pair of locking recesses, a locksets of lost motion connections, .the locking ing arm adapted in one extreme position to devices are free before the operating mechengage one of said recesses and in the other anism commences to operate the arm 8 thus extreme position to engage the other of said rendering the part easy of operation. It will recesses and an operating means connected also be apparent that in the operation of the to the operating arm by a lost motion condevice the operating mechanism for the'gate nection and to the locking arm, whereby the gives the locking means a preliminary movelocking arm is released from its locking conment while the weight 9 gives such locking nection with the recesses before the operatmechanism its final movement to locking ing means commences to turn the operating position so that in any case the lock-parts arm. will engage tightly at the end of their travel 6. In combination, a gate operating shaft irrespective of the wear of the operating 3, an operating arm 8 secured thereto and parts. provided with the two locking recesses 14, Having thus described my invention and an oscillatory locking arm 9 provided with illustrated its use, what I claim as new and engaging means 13 and 16, a weight 10 for desire to secure by Letters Patent, is the, folcarrying the arm 9 to its final locking posilowing: tion and an operating member 7 provided 1. In combination, a gate operating shaft, with the slot 10 for engaging the end of the an operating arm secured thereto and proarm 8 and the slot 12 for engaging the envided with a pair of locking recesses, means gaging means 13. for operating the operating arm, and an oscil- 7. In combination, a gate operating shaft, latory locking arm having connection to the an operating member having operative conoperating means and adapted to engage one nection with the shaft and provided with of the locking recesses when the operating lock engaging means, power means for opand locking arms reach either of their two crating the operating member secured thereextreme positions. to by lost motion connections, and a lock- 2. In combination, a gate operating shaft, ing member having connection with the power means for securing a preliminary lockan operating member secured thereto and provlded with lock engaging means, lost moing movement of the locking member, and

tion connections for operating the operating locking member its final movement to looking position and holding it in such position.

In testimony whereof, I hereunto sign my name in the presence of the two subscribed lost motion connection with said operating means and adapted to move the lock engaging means partially to locking posltlon,

and a weight for giving the locking member witnesses. its final movement to locking position. JOHN J. GARD.

3. In combination, a gate operating shaft, I/Vitnesses:

F. E. PLACE,

an operating member secured thereto and I provided with lock engaging means, 10st mo- JNo. L. WALKER.

independent automatic means for giving the 

